PT-2022-21380 · Mattermost · Mattermost

Catenacyber + 1 · Published 2022-09-23 · Updated 2024-03-06 · CVE-2022-3257

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Mattermost versions 7.1.x and earlier

Description The issue arises when a specifically crafted GIF file is uploaded while drafting a post, allowing authenticated users to cause resource exhaustion during file processing. This results in a server-side Denial of Service.

Recommendations For Mattermost versions 7.1.x and earlier, update to a version that includes a fix for this issue to prevent resource exhaustion and Denial of Service attacks. As a temporary workaround, consider restricting the upload of GIF files while drafting posts until a patch is available.

Exploit

Fix

DoS

Resource Exhaustion

Unrestricted File Upload

Weakness Enumeration

CWE-400

CWE-434

Related Identifiers

BIT-MATTERMOST-2022-3257

CVE-2022-3257

GHSA-M7W4-Q5VG-5XFP

Affected Products

Mattermost

References · 9

• 🔥 https://hackerone.com/reports/1620170 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2022-3257 · Security Note
• https://osv.dev/vulnerability/CVE-2022-3257 · Vendor Advisory
• https://mattermost.com/security-updates · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-m7w4-q5vg-5xfp · Vendor Advisory
• https://osv.dev/vulnerability/BIT-mattermost-2022-3257 · Vendor Advisory
• https://github.com/mattermost/mattermost-server · Note
• https://t.me/cvenotify/36841 · Telegram Post
• https://t.me/cibsecurity/50347 · Telegram Post